Bently Nevada 3500/42M-SIL2-09-R0 Proximitor/Seismic Monitor

Hardware Specifications

Bently Nevada Machinery Monitoring Characteristics

The 3500/42M processes signals from proximity and seismic transducers and assigns measurement functions through 3500 configuration software. Therefore, the same hardware can support different machinery variables according to the installed transducer type and configured channel function.

For eddy-current probe applications, the monitor receives the conditioned proximity signal from the associated Proximitor system. Proper probe scaling and gap voltage validation should precede machinery measurement verification. In particular, a -10 VDC gap voltage target is a standard reference used with Bently Nevada eddy-current probe systems when applicable to the installed probe and Proximitor configuration.

The measurement architecture supports radial vibration, thrust position, differential expansion, and eccentricity monitoring. Additionally, acceleration, velocity, shaft absolute, REBAM, and circular acceptance region functions can be configured where supported by the selected channel arrangement.

The module continuously compares measured static values with configured Alert and Danger thresholds. Consequently, the protection logic can generate machinery alarms when measured conditions exceed the programmed limits.

Frequently Asked Questions

Q: How many transducer channels does the 3500/42M provide?
A: The monitor provides 4 input channels for compatible proximity, velocity, or acceleration transducers.

Q: Can one 3500/42M support different measurement functions?
A: Yes. Each channel pair can be configured for up to two supported measurement functions simultaneously through 3500 software.

Q: What environmental temperature range does the module support?
A: The specified operating range is -30 deg C to +65 deg C when installed in a 3500 Rack. The specified storage range is -40 deg C to +85 deg C.

Field Installation Guidelines

Install the module in the designated 3500 Rack slot and verify that the rack configuration matches the intended monitor function.

Connect proximity and seismic transducers according to the applicable Bently Nevada wiring documentation. Keep transducer signal wiring separated from high-current power conductors and switching circuits to limit induced electrical noise.

For eddy-current probe installations, verify probe polarity, Proximitor compatibility, cable routing, and gap voltage before accepting vibration or position measurements.

Terminate cable shields according to the plant grounding design and the applicable Bently Nevada installation documentation. Avoid creating unintended shield-ground loops.

After installation, verify each channel’s configured transducer type, measurement function, scaling, Alert setpoint, and Danger setpoint through the 3500 configuration software.

Confirm that recorder outputs correspond to the configured measurement values before connecting the module to external monitoring or control equipment.